Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7716602 | International Journal of Hydrogen Energy | 2014 | 10 Pages |
Abstract
Composite cathode based on La0.75Sr0.25Cr0.5Mn0.5O3âδ (LSCM) can be used for direct carbon dioxide electrolysis without a flow of reducing gas over it in an oxide-ion-conducting solid oxide electrolyzer; however, the insufficient electro-catalytic activity of LSCM electrode still restricts electrode performance and Faraday current efficiency. In this work, catalytic-active copper nanoparticles are grown on the surface of LSCM cathode via in-situ exsolution of copper metal from A-site deficient and B-site excess (La0.75Sr0.25)0.9(Cr0.5Mn0.5)0.9Cu0.1O3âδ (LSCMC) after reduction. XRD, SEM, EDS and XPS results together confirm the reversible exsolution of copper nanocatalyst on the surface of LSCM. Carbon dioxide adsorption/desorption of LSCM is investigated. The electrical properties of reduced LSCMC are investigated and correlated to the electrochemical performance of the composite electrodes. The current efficiencies of approximately 85% are obtained with LSCM cathode decorated with copper nanocatalyst for direct carbon dioxide electrolysis in an oxide-ion-conducting solid oxide electrolyzer.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Huaxin Li, Gehui Sun, Kui Xie, Wentao Qi, Qingqing Qin, Haoshan Wei, Shigang Chen, Yan Wang, Yong Zhang, Yucheng Wu,